Prenatal vitamins & Pregnancy

Rachel • 9 years of infertility due to PCOS and Endometriosis. Miracle baby boy born 24.05.2019 ✨💙👶🏼 due with my second baby boy Dec 2020 💙 #boymum
So I've just started taking prenatal vitamins and I'm wondering if anyone has any recommendations or tips? I'm 26 and have been ttc for a year now... I started today but have no idea how long it could take for them to work? Thanks 💋💋